STD12
STD12 is a grade designated under KS. Its recorded composition includes C 0.95–1.05%, Si 0.1–0.4%, Cr 4.8–5.5%, Mn 0.4–0.8% and Mo 0.9–1.2%. No cross-standard equivalents are recorded for this grade yet. Recorded mechanical properties include HB 241.
- Designations 1
Chemical composition
8 elements on file · weight %What this alloy is
Logarithmic scale, 0.01 % to 100 % — every value here compares directly, decade by decade.
| Element | % by weight |
|---|---|
0.95–1.05 | |
0.1–0.4 | |
0.4–0.8 | |
≤ 0.03 | |
≤ 0.03 | |
4.8–5.5 | |
0.9–1.2 | |
0.15–0.35 |
The scale is logarithmic, not the element’s raw share of the alloy — the only honest way to fit 0.01 % and 100 % in one picture, and it means every value here can be compared with every other.
| Element | As publishedsource text, verbatim | Min% by weight | Max% by weight | Bound |
|---|---|---|---|---|
| C | 0.95 - 1.05 | 0.950 | 1.050 | Range |
| Si | 0.1 - 0.4 | 0.100 | 0.400 | Range |
| P | max 0.03 | — | 0.030 | Max |
| S | max 0.03 | — | 0.030 | Max |
| V | 0.15 - 0.35 | 0.150 | 0.350 | Range |
| Cr | 4.8 - 5.5 | 4.800 | 5.500 | Range |
| Mn | 0.4 - 0.8 | 0.400 | 0.800 | Range |
| Mo | 0.9 - 1.2 | 0.900 | 1.200 | Range |
The published column is the source string byte-for-byte, decimal comma and all; Min and Max are the parsed bounds. Elements not listed have no value on file — they are omitted, never inferred.
Predicted transformation temperatures
Not enough recorded composition to predict a transformation temperature for this grade — missing: Ni.
Physical & mechanical properties
An absent property means we hold no value for it — it is left out rather than estimated, interpolated from a neighbouring grade, or filled from a handbook. It does not mean the property is undefined for the material.
Looking for this grade under another name?
Search the catalogue by designation, material number or composition — every name on this page is itself a way in.